The suspect in a shooting at a leading French newspaper office had lived in Britain for several years before returning to France in July, according to the Associated Press.
Abdelhakim Dekhar remains in custody in a suburban Paris hospital after police detained him on Wednesday night, the Paris prosecutor said.
Prosecutor Francois Molins told reporters that the witness who turned Dekhar in said he had been staying with him and that they had met while working in a restaurant together in London 13 years ago.
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M&S chief executive, Steve Rowe, has decided to take a more aggressive approach.
People are being encouraged to leave tributes and messages on the trees, which are on a trail in the city close to Manchester Arena.
Another warm sunny day tomorrow with a few showers possible